CVE-2025-21972Linux · Linux_kernel
Vulnerability data via NVD (ingested)
In the Linux kernel, the following vulnerability has been resolved: net: mctp: unshare packets when reassembling Ensure that the frag_list used for reassembly isn't shared with other packets. This avoids incorrect reassembly when packets are cloned, and prevents a memory leak due to circular references between fragments and their skb_shared_info. The upcoming MCTP-over-USB driver uses skb_clone which can trigger the problem - other MCTP drivers don't share SKBs. A kunit test is added to reproduce the issue.
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
vuln:CVE-2025-21972os:"Linux Kernel"More intel sources (5)
vuln:CVE-2025-21972vulnerabilities.cve_id: CVE-2025-21972CVE-2025-21972CVE-2025-21972"CVE-2025-21972" exploit -site:nvd.nist.gov